kc3-lang/kc3/libc3/binding.c

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• Hash : 7f2f72e4
  Author : Thomas de Grivel
  Date : 2024-03-04T14:19:12
  

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• libc3/binding.c

• /* c3
   * Copyright 2022-2024 kmx.io <contact@kmx.io>
   *
   * Permission is hereby granted to use this software granted the above
   * copyright notice and this permission paragraph are included in all
   * copies and substantial portions of this software.
   *
   * THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
   * PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
   * AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
   * THIS SOFTWARE.
   */
  #include "alloc.h"
  #include "assert.h"
  #include "binding.h"
  #include "list.h"
  #include "tag.h"
  
  void binding_delete (s_binding *binding)
  {
    assert(binding);
    tag_clean(&binding->value);
    free(binding);
  }
  
  void binding_delete_all (s_binding *binding)
  {
    s_binding *next;
    while (binding) {
      next = binding->next;
      binding_delete(binding);
      binding = next;
    }
  }
  
  const s_tag * binding_get (const s_binding *binding, const s_sym *name)
  {
    while (binding) {
      if (binding->name == name)
        return &binding->value;
      binding = binding->next;
    }
    return NULL;
  }
  
  s_binding * binding_init (s_binding *binding, const s_sym *name,
                            const s_tag *value, s_binding *next)
  {
    s_binding tmp = {0};
    assert(binding);
    if (! tag_init_copy(&tmp.value, value))
      return NULL;
    tmp.name = name;
    tmp.next = next;
    *binding = tmp;
    return binding;
  }
  
  s_binding * binding_new (const s_sym *name, const s_tag *value,
                           s_binding *next)
  {
    s_binding *binding;
    binding = alloc(sizeof(s_binding));
    if (! binding)
      return NULL;
    if (! binding_init(binding, name, value, next)) {
      free(binding);
      return NULL;
    }
    return binding;
  }
  

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